20 g of NaOH (molar mass = 40 g mol^ -1 ) is dissolved in 500 cm^3 of water. Molality of solution is

MHT CET Chemistry question

20 g of NaOH (molar mass = 40 g mol) is dissolved in 500 cm of water. Molality of solution is

Answer: (D)

Moles of NaOH = 20/40 = 0.5 mol; 500 cm of water has a mass of 500 g = 0.5 kg, so molality = 0.5/0.5 = 1.0 m; 0.5 m

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Question ID VK-060887